Maybe they could keep it running. With the way models are improving though, I don't think that'd be useful for long. In 6 months or a year when the frontier is again pushed out, I don't think the military is going to want to be running Opus 4.6
And contrary to what the model-makers would like you to believe, I don't think we're anywhere close to the system being self-improving enough that you could just let it run without intervention and it spits out a new frontier model